Mozillion Review 2026: How Does It Compare?

Mozillion is a UK MVNO running on EE's network, best known as a refurbished phone marketplace before it launched SIM only plans. Plans start from £3.00 per month, none require a credit check, and Mozillion states it does not apply mid-contract price rises on any contract length. This review compares Mozillion directly with Spusu, Lycamobile, and Giffgaff to help you decide whether it is the right network for you.

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Reviewed by: Phil Brown, founder of SIM Only Finder. Phil previously worked in UK mobile retail at Three UK, advising customers on SIM plans, contracts, and network choices. He has spent over a decade running consumer comparison platforms and reviews networks and SIM-only deals based on that hands-on industry background. About the author

Last reviewed: July 2026. Updated regularly to reflect current plan pricing, network changes, and roaming policies.

How we reviewed Mozillion

To put this review together, we checked Mozillion's current plan lineup and pricing against live deal data in July 2026, verified the underlying network, credit check policy, and price rise terms directly against Mozillion's published terms, and reviewed its roaming allowances and payment structures. Coverage reliability assessments reference the most recent RootMetrics UK RootScore Report and Ofcom Connected Nations data.

What is Mozillion?

Mozillion is an MVNO that runs on EE's network, so its coverage and signal are identical to EE's in any given location. It began as a marketplace for new and refurbished phones and added SIM only plans through a partnership with EE. Every plan includes unlimited minutes and texts, 5G at no extra cost, EU roaming across 41 European destinations, and no credit check, and each data allowance is sold on 30 day rolling, 12 month, and 24 month terms, with the monthly price falling the longer you commit. Mozillion also offers discounted structures where you pay half or all of the contract cost upfront.

Mozillion vs Spusu

Spusu is a budget MVNO that also runs on EE. The comparison is useful because the two share the same infrastructure but take opposite approaches to contract length. Read our full Spusu review or compare Spusu SIM only deals.

Network

Both run on EE, which has ranked as the most reliable network in the UK in every RootMetrics RootScore Report since 2020, most recently in their H2 2025 report. Coverage is identical between the two.

Draw.

Price

Spusu's rolling plans start from £2.90 per month for 1GB. Mozillion's rolling plans start from £4.00 per month for 1GB, but its 12 month plan drops to £3.50 and its 24 month plan to £3.00 for the same allowance. On a like-for-like rolling basis Spusu is cheaper; on fixed terms Mozillion pulls ahead, because Spusu does not offer fixed-term contracts at all.

Edge: Spusu for rolling monthly, Mozillion for fixed term.

Contract options

Spusu sells rolling one month plans only. Mozillion sells every allowance on 30 day, 12 month, and 24 month terms, all without a credit check, which is rare on fixed contracts. If you want to lock a price in for two years, Spusu simply cannot do that.

Edge: Mozillion.

Price rises

Neither network applies mid-contract price rises. Spusu has committed to frozen prices through to at least 2027, and Mozillion states its prices are fixed for the duration of any plan. Both are covered in our guide to mid-contract price rises.

Draw.

Roaming

Both include EU roaming with a capped data allowance rather than your full UK allowance. Spusu's roaming data runs from 3GB on its smallest plan up to 20GB, alongside 500 EU minutes and texts. Mozillion's caps are lower at the budget end, at roughly a quarter of your UK allowance, which means just 250MB of roaming data on the 1GB plan. For anything more than very light use abroad on a cheap plan, Spusu's allowances go further.

Edge: Spusu.

Verdict

If you want maximum flexibility on a rolling plan, the lowest rolling entry price, and more generous roaming, Spusu has the edge. If you want to fix a low price for one or two years without a credit check, Mozillion offers something Spusu does not sell at all.

Mozillion vs Lycamobile

Lycamobile is one of the UK's longest-established MVNOs and, like Mozillion, runs on EE and sells fixed-term contracts without credit checks. Read our full Lycamobile review or compare Lycamobile SIM only deals.

Network

Both run on EE, so coverage is identical.

Draw.

Price

Mozillion's 24 month plans start from £3.00 per month for 1GB with unlimited minutes and texts. Lycamobile's 24 month plans start from £4.00 per month, typically with a larger data allowance but capped minutes and texts on entry plans. Mozillion has the lower entry price; Lycamobile tends to offer more data per pound as allowances rise.

Edge: Mozillion for the lowest fixed-term entry price, Lycamobile for data value at higher tiers.

International calling

Lycamobile includes 100 international minutes to over 40 countries on most plans, a legacy of its focus on international callers. Mozillion includes unlimited UK minutes and EU roaming, but calls to international numbers from the UK require a paid wallet top-up.

Edge: Lycamobile.

Plan structure

Mozillion sells every allowance at all three contract lengths with identical benefits, and offers upfront payment options that reduce the total cost. Lycamobile's range is broader but less uniform, with entry plans carrying capped minutes and some deals led by promotional pricing that rises after the opening months.

Edge: Mozillion for simplicity and transparency.

Verdict

If you call internationally outside the EU, Lycamobile's included international minutes make it the stronger choice. For everyone else at the budget end, Mozillion's lower entry price, unlimited UK minutes on every plan, and simpler pricing give it the edge.

Mozillion vs Giffgaff

Giffgaff runs on O2's network and is one of the most recognisable budget MVNOs in the UK, so it is the name most people will weigh a smaller brand like Mozillion against. Compare Giffgaff SIM only deals.

Network

Mozillion runs on EE. Giffgaff runs on O2. EE has a broader 4G coverage footprint and has consistently ranked higher than O2 in independent reliability testing, holding the top spot in every RootMetrics RootScore Report since 2020.

Edge: Mozillion.

Price

Mozillion's plans start from £3.00 per month on a 24 month term and £4.00 rolling, all with unlimited minutes and texts. Giffgaff's cheapest goodybag is around £6.00 per month with unlimited minutes and texts and a small data allowance. At the entry level, Mozillion is roughly half the price.

Edge: Mozillion.

Flexibility

Giffgaff's goodybag model lets you change your allowance up or down every month, with no contract on rolling plans. Mozillion's rolling plans offer similar freedom, but its cheapest prices require a 12 or 24 month commitment. For someone whose usage varies month to month, Giffgaff's structure is easier to live with.

Edge: Giffgaff.

Customer service

Mozillion offers phone-based customer support during business hours. Giffgaff has no phone support at all; help comes through its online community and web support. If speaking to a person matters to you, that is a meaningful difference.

Edge: Mozillion.

Verdict

Giffgaff earns its reputation on flexibility and community, but Mozillion beats it on the three things most budget SIM buyers care about: a stronger underlying network, a lower price, and the ability to phone someone when something goes wrong.

Mozillion pros and cons

Pros:

• Runs on EE, the top-ranked network in every RootMetrics RootScore Report since 2020
• No credit check on any plan, including 12 and 24 month contracts
• No mid-contract price rises; the price you sign up at is fixed for the term
• Every allowance available on 30 day, 12 month, and 24 month terms
• Unlimited UK minutes and texts on every plan
• EU roaming across 41 European destinations included
• 5G included at no extra cost, with speeds uncapped under Mozillion's published terms
• eSIM or physical SIM available on every plan

Cons:

• Roaming data is capped at roughly a quarter of your UK allowance, which is just 250MB on the 1GB plan
• Rolling plans cost more than Spusu's equivalent, so flexibility carries a premium
• International calls from the UK require a paid wallet top-up rather than an included allowance
• Account management is through a web dashboard; there is no dedicated app for your SIM plan
• Customer support operates business hours rather than 24/7
• Some customers report delays with number porting and email response times

How to get a Mozillion SIM only deal

You can compare current Mozillion plans and click through directly from our Mozillion SIM only deals page, where deals are sorted by monthly cost by default and can be filtered by data allowance, contract length, and eSIM availability. When you are ready to switch, you can keep your existing number by requesting a PAC code from your current network: text PAC to 65075 and give the code to Mozillion when you sign up. There is no credit check on any plan, so the process is quick from order to connected. Our PAC code guide explains the full process.

Is Mozillion worth it?

For the right user, yes. If you want EE coverage at a very low fixed price and a credit check would be a barrier, Mozillion is arguably the strongest option on the market, because no other network combines fixed-term prices from £3.00 per month with a no credit check policy across every contract length and a written commitment to no mid-contract price rises. It won our comparisons against Giffgaff outright and beat Lycamobile for most users who do not call internationally.

The honest caveat is roaming and flexibility. The capped roaming data makes the cheapest plans a poor choice for anyone who travels regularly, where Spusu is the better EE-based pick, and Mozillion's rolling plans are not the cheapest way to stay commitment-free. If neither of those applies to you, it is hard to argue with the value.

Compare current Mozillion SIM only deals

Editorial policy

This guide is produced by the SIM Only Finder editorial team to help UK mobile customers compare Mozillion against other SIM only networks. Network terms, pricing, and plan availability are checked regularly and updated to reflect current offers. Always confirm current terms directly with the network before signing up.